Cam lock



Nov. 21, 1967 7 L. e. GREEN 3,353,856

CAM LOCK Filed April 12. 1965 ATTOP/VA'VS United States Patent 3,353,856CAM LOCK Louis George Green, Huntsville, Ontario, Canada, as-

signor of forty-nine percent to Norman C. MacDonald, Huntsville,Ontario, Canada Filed Apr. 12, 1965, Ser. No. 447,226

Claims priority, application Canada, Jan. 29, 1965,

3 Claims. (Cl. 29266) ABSTRACT OF THE DISCLOSURE The invention providesa device for urging a slidable pane to a position against a fixed paneand against a window jamb remote from the fixed pane and for locking theslidable pane in that position. The device comprises a base forattachment to a window frame, a striker bar mounted on the base for bothpivotal and sliding movement, and a handle connected pivotally to thebase and to the striker and actuable to effect movement of the strikerrelative to the base. The arrangement of the pivotal connections is suchthat when the window is locked is cannot be opened without manipulatingthe handle.

This invention relates to a lock for sashless sliding glass windowscomprising a frame and at least two overlapping glass panes, at leastone of the panes being slidably mounted and having a side edge adapted,in the closed position of the window, to abut a jamb of the frame.

It is an object of the present invention to provide a lock adapted to bemounted on the frame and, when actuated, to urge the overlapping panestogether and preferably, at the same time, to urge the sliding panetowards the jamb to effect sealing engagement therebetween.

Accordingly, the lock of the present invention comprises a base adaptedfor attachment to the frame of a sashless window adjacent a slidingwindow pane, a striker bar for engaging and looking said pane againstsliding movement, a handle, first pivot means pivotally interconnectingsaid handle and said base, second pivot means pivotally interconnectingsaid handle and said striker bar to allow pivotal movement therebetween,and third pivot means pivotally interconnecting said striker bar andsaid base to allow pivoted movement of the striker bar toward and awayfrom the sliding pane, said first, second and third pivot means beingmutually spaced whereby manipulation of said handle effects pivotalmovement of said striker bar and the arrangement being such that, in thelocking position, the striker bar cannot be moved away from the pane bypressure on the pane but only by manipulation of the handle.

A preferred embodiment of the present invention comprises a base plateadapted to be mounted on the frame of a sashless window adjacent to asliding glass pane, a striker bar mounted on the base plate and meansprovided to engage the striker bar with the sliding glass pane wherebythe sliding glass pane may be urged against the fixed pane and sealinglyengaged with a jamb of the frame in closed position, the said meansincluding a pin and slot connecting said base plate and said striker barto permit both pivotal movement of the striker bar towards and away fromthe slidable pane and slidable movement of the striker bar substantiallyparallel to the slidable pane, an operating handle, first pivot meansmounting said handle on said base plate and second pivot meansconnecting said handle and said striker bar and laterally spaced fromsaid first pivot means, whereby, upon pivotal movement of said handletoward the slidable pane, said striker bar engages said sliding pane andurges said pane both outwardly and laterally.

The invention, both as to its structure and mode of operation, will bebetter understood by reference to the following disclosure and theaccompanying drawings of a preferred embodiment. In the drawings:

FIGURE 1 is a fragmentary prespective view of the lock of the presentinvention shown in locked position in engagement with a sliding glasspane;

FIGURE 2 is a plan view of the lock of the present invention showing thestriker bar in initial contact with the sliding glass pane; and

FIGURE 3 is a plan view of the lock of the present invention showing thestriker bar in full engagement with the sliding glass pane, the panebeing sealingly engaged with the jamb of the window frame.

Referring in detail to the drawing, specifically to FIG URE 1, the lock1 is shown in locked engagement with a glass pane 3 which is slidablymounted in groove 4 of a sashless window frame. The groove is formedlongitudinally in sill 2 of the frame and, as shown in FIG- URES 2 and3, groove 4 extends laterally into a jamb 5 at 9.

As illustrated, lock 1 is comprised of a base plate 6, a striker bar 11and a handle 16. Plate 6 has a guide pin 12 rigidly mounted thereon. Thestriker bar 11 has a main straight portion with a curved end designed tocontact pane 3 and also has a guide slot 13 adapted to fit over pin 12of base plate 6. Handle 16 is pivotally connected to bridge member 17 ofplate 6 by means of upwardly directed pivot pin 18 disposed thereon andengaging in a corresponding hole in the bridge member. Handle 16 furtherincludes a downwardly directed pin 14, eccentrically positioned withrespect to pivot pin 18 and adapted to fit snugly into a correspondingcircular hole in striker bar 11 to pivotally connect the handle with thestriker bar. Striker bar 11 is further provided with a resilient pad ormember 20 having a friction surface 21 and positioned on the curved endadjacent pane 3.

The base plate 6 is constructed with laterally extending flanges 10a and10b, the flanges being provided with slots 8a and 8b for receivingscrews 7, whereby the lock may be slidably adjusted on sill 2 relativeto glass pane 3.

The lock 1 is shown in the open position by means of the dotted lines inFIGURE 3. It will be noted that, in this open position, pin 14 islocated on the opposite side of pivot pin 18 from pane 3 and thatstriker bar 11 is displaced towards the left, away from jamb 5. It willalso be noted that with the lock in open position, slot 13 is angulatedwith respect to the planar surface of pane 3.

To lock the sliding pane 3 in sealing engagement with the fixed pane 22and jamb 5 of the frame, the pane 3 is initially pushed by handlaterally to the right until it enters groove 9, as shown in FIGURE 2.Handle 16 is then swung in clockwise direction from the dotted positionshown in FIGURE 3 so that pin 14 swings the striker bar 11 about pin 12,driving the bar towards pane 3. Resilient pad 20 contacts pane 3 andurges the pane outwardly across groove 4, bringing pane 3 into flushcontact with the opposite side of groove 4 and the fixed pane 22 asillustrated in FIGURE 1. At this point slot 13 is parallel to the planarsurface of pane 3. Pin 14 is positioned to the left of pivot 18.

Upon further rotation of handle 16 in the clockwise direction, pin 14,as well as further urging bar 11 against pane 3, pushes striker bar 11laterally to the right, thereby urging pane 3 against jamb '5, so thatupon full rotation of handle 16 to the position shown in solid lines inFIGURE 3, pane :3 is sealingly engaged with jamb 5 as illustrated.

What I claim as my invention is:

1. A lock for sliding glass windows having a frame and at least twooverlapping window panes, at least one of said panes being slidablymounted, said lock comprising a base plate adapted to be mounted on saidframe adjacent the slidably mounted pane, a striker bar mounted on saidbase plate and means provided to engage said striker bar with saidslidably mounted pane whereby said pane may be urged against a fixed.pane and sealingly engaged with a jamb of said frame in a closedposition, said means including a pin and slot connecting said base plateand said striker bar to permit both pivotal movement of the striker bartowards and away from the slidably mounted pane and slidable movement ofthe striker bar substantially parallel to the slidably mounted pane, anoperating handle, first pivot means pivotally interconnecting saidhandle and said' base plate and second pivot means connecting saidhandle and said striker bar and laterally spaced from said first pivotmeans, whereby, upon pivotal movement of said handle toward the slidablymounted pane, said striker bar engages said slidably mounted pane andurges said pane both outwardly and laterally, said second pivot means,when said lock is. in an unlocked position, being located on theopposite side of said first pivot means from said slidably mounted paneand, when said lock is in a locked position, being located intermediatesaid first pivot means and said slidably mounted pane with said slotextending substantially parallel to the slidably mounted pane.

2. A lock as claimed in claim 1 wherein the pin is mounted on said baseplate and the slot is disposed longitudinally in said striker bar andsaid second pivot means comprises a pin mounted on said handle eccentricto said first pivot means and" engaging in a circular hole provided insaid striker bar.

3. A lockas claimed in claim 1 wherein said striker bar is provided witha friction surface.

References Cited UNITED STATES: PATENTS 1,387,564 8/1921 Struebing;

1,664,602 4/ 1928 Everett 292-342 2,534,396 12/1950 Barnes 292--1132,961,263 11/1960 Ahlgren.

3,060,487 10/1962 Baxter.

3,180,667 4/1956 Auboin et al 292-200 FRANCIS K. ZUGEL, PrimaryExaminer.

EDWARD C. ALLEN, Examiner.

J. R. MOSES, Assistant Examiners.

1. A LOCK FOR SLIDING GLASS WINDOWS HAVING A FRAME AND AT LEAST TWOOVERLAPPING WINDOW PANES AT LEAST ONE OF SAID PANES BEING SLIDABLEMOUNTED, SAID LOCK COMPRISING A BASE PLATE ADAPTED TO BE MOUNTED ON SAIDFRAME ADJACENT THE SLIDABLY MOUNTED PANE, A STRIKER BAR MOUNTED ON SAIDBASE PLATE AND MEANS PROVIDED TO ENGAGE SAID STRIKER BAR WITH SAIDSLIDABLY MOUNTED PANE WHEREBY SAID PANE MAY BE URGED AGAINST A FIXEDPANE AND SEALINGLY ENGAGED WITH A JAMB OF SAID FRAME IN A CLOSEDPOSITION, SAID MEANS INCLUDING A PIN AND SLOT CONNECTING SAID BASE PLATEAND SAID STRIKER BAR TO PERMIT BOTH PIVOTAL MOVEMENT OF THE STRIKER BARTOWARDS AND AWAY FROM THE SLIDABLY MOUNTED PANE AND SLIDABLE MOVEMENT OFTHE STRIKER BAR SUBSTANTIALLY PARALLEL TO THE SLIDABLY MOUNTED PANE, ANOPERATING HANDLE, FIRST PIVOT MEANS PIVOTALLY INTERCONNECTING SAIDHANDLE AND SAID BASE PLATE AND SECOND PIVOT MEANS CONNECTING SAID HANDLEAND SAID STRIKER BAR AND